EP0012048A1 - Schalter mit rotierendem Lichtbogen - Google Patents

Schalter mit rotierendem Lichtbogen Download PDF

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Publication number
EP0012048A1
EP0012048A1 EP79400820A EP79400820A EP0012048A1 EP 0012048 A1 EP0012048 A1 EP 0012048A1 EP 79400820 A EP79400820 A EP 79400820A EP 79400820 A EP79400820 A EP 79400820A EP 0012048 A1 EP0012048 A1 EP 0012048A1
Authority
EP
European Patent Office
Prior art keywords
electrode
arc
coil
switch according
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79400820A
Other languages
English (en)
French (fr)
Other versions
EP0012048B1 (de
Inventor
Georges Bernard
Pierre Leclercq
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0012048A1 publication Critical patent/EP0012048A1/de
Application granted granted Critical
Publication of EP0012048B1 publication Critical patent/EP0012048B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention relates to an alternating current switch with magnetic blowing generating a rotation of the arc, comprising an insulating envelope containing a gas with high dielectric strength, a pair of separable contacts, a first annular electrode associated with one of said contacts and a tubular coil coaxial with said first electrode to generate a magnetic field in the zone of formation and extension of the arc drawn between said contacts during the separation of the latter and to impose a rotary migration of the root of said anchored arc on the first electrode.
  • the switch according to the present invention is characterized in that said first electrode in the form of a thick ring made of a good conductive material is attached to the internal edge of the front face of the coil on the side of the arc formation zone for sensing the arc root as soon as the arc forms, that said first electrode covers only a small fraction of said front face to limit the electrodynamic repulsion forces of the first electrode generated by a variation of the current in said coil and that a metal screen is interposed between the arc-forming zone and the part of the front face not covered by the first electrode.
  • the annular electrode extends only over a small part of the front face of the coil, which makes it possible to limit the electrodynamic forces and to position the arc root.
  • the metallic screen subjected to the action of the magnetic field generated by the coil is also the seat of induced currents, but their influence can be limited by the use of a material of low conductivity and a screen of thin thickness . This screen can be shaped as a deflector of ionized gases.
  • Rotating arc switches are known in which the annular electrode only partially covers the front surface of the coil (German patent application No. 2,511,238 (fig. 3) and French patent? 2,285,700), but the surface covered by the electrode is greater than half of the front surface and the reduction in repulsion forces is insufficient.
  • the high cylindrical shape of the annular electrode does not allow a concentration of the currents induced in the electrode near the arc and at the zero crossing of the current the intensity of the blowing field of the arc generated by these induced currents is weak and insufficient to extinguish the arc.
  • the section of the annular electrode is inscribed in a circle and the center of gravity of the induced currents coincides with the center of the circle.
  • the coil is secured to a metal carcass, to which is fixed, for example by welding, the annular electrode.
  • the metal carcass constitutes a hoop of the coil as well as a rigid support of the annular electrode capable of withstanding the significant forces of repulsion generated by short-circuit currents flowing through the coil.
  • the carcass is advantageously made of a ferromagnetic material, in particular mild steel, capable of increasing lie in the blowing magnetic field when breaking low currents.
  • the annular electrode is tightly coupled to the blow coil and it constitutes a ring in short-circuit of phase shift located in the zone of maximum field and allowing a conservation of the magnetic blow field at the passage of the current by zero.
  • a second electrode is placed opposite the first one to position the arc in the zone of maximum field generated by the induced currents.
  • a sealed envelope 10, of elongated shape, made of a molded insulating material, is filled with sulfur hexafluoride and contains a fixed contact 12 capable of cooperating with a sliding movable contact 14.
  • the contacts 12, 14, of elongated are arranged coaxially with the casing 10 and are connected to feed-through bushings 16, 17.
  • one of the contacts, in this case the movable contact 14 is tubular to allow the gases to escape through the interior of this contact.
  • Fixed contact 12 is rigidly fixed a carcass 18, having an annular recess 20 for housing a blowing coil 22.
  • the carcass 18 and the coil 22 coaxially surround the fixed contact 12 and the front face 24 of the coil 22 is disposed substantially at the end 26 of the fixed contact 12, forming the contact face cooperating with the movable contact 14.
  • the coil 22 is inserted without play in the housing 20, between an internal ferrule 28 and an external ferrule 30 of the carcass 18.
  • the external ferrule 30 constitutes a hoop opposing the bursting of the coil 22, when the latter is traversed by large currents.
  • an annular electrode 32 made of a good conductive material, resistant to the action of arcs.
  • the electrode 32 projects from the end 26 of the contact 12 and includes a collar projecting from the internal edge of the front face 24 of the coil 22 while being attached to the latter.
  • the electrode 32 is in the form of a thick ring, the cross section of which is substantially in a circle.
  • the carcass 18 is made of a ferromagnetic metallic material, in particular mild steel, and the electrode 32 is preferably welded to the ferrule 28 to form a one-piece assembly with the carcass 18 and the coil 22.
  • the part of the face 24 of the coil 22 not covered by the collar of the electrode 32 is capped by an annular washer 34, which carries by means of an insulating ring 38, a screen 36, which surrounds the electrode 32 with little play and is extended by a frustoconical part 40 surrounding the zone of formation and extension of the arc.
  • the part 40 extends to the vicinity of the wall of the envelope 10 and constitutes a deflector of the gases ionized by the arc.
  • the coil 22 is connected on the one hand to the contact 12 and on the other hand to the electrode 32 by conductors (not shown).
  • the movable contact 14 is associated with a fixed tubular electrode 42 having an annular end surface 44 in re gard and of the same diameter as the electrode 32, the spacing between the surface 44 and the electrode 32 corresponding to the optimal extinction distance of the arc.
  • the end 26 of the fixed contact 12 has at its center a recess 46 and the electrode 42 is split along a generator.
  • the electrodynamic repulsion efforts of the electrode 32 are limited by the limited width of the electrode 32 and are easily taken care of by attachment to the carcass 18. It is advantageous to cover only a small part of the front surface 24 of the coil 22 by the electrode 32, the other larger part being capped by the screen 36 and the washer 34.
  • the metal carcass 18 holds the coil 22, the front face 24 and the insulating ring 38 are protected by the electrode 32, the screen 36 and the washer 34.
  • the washer 34 and the screen 36 are thin and made of a metallic material of low conductivity, such as stainless steel. They are the seat of limited induced currents and therefore only support repulsion forces easily taken up by the carcass 18.
  • the screen 36 protects the front face 24 of the coil 22 and its deflector 40 deflects the gases ionized by the arc by protecting the wall of the enclosure 10.
  • the deflector also serves as a condensation wall.
  • the ferromagnetic carcass 18 strengthens the magnetic field generated by the weak currents and allows obtaining a sufficient blowing for the rotation of the arcs of weak current.
  • the carcass 18 can be made of mild steel.
  • the recess 46 prevents the migration of the arc root, anchored to the fixed contact 12, towards the center of the latter and the slot of the electrode 42 limits the induced currents and the repulsion forces.
  • the electrode 42 is not essential, the arc remaining in this case anchored on the movable tubular contact 14 in a position less favorable for its extinction when the current crosses zero.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
EP79400820A 1978-11-10 1979-11-05 Schalter mit rotierendem Lichtbogen Expired EP0012048B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7832206 1978-11-10
FR7832206A FR2441261A1 (fr) 1978-11-10 1978-11-10 Interrupteur a arc tournant

Publications (2)

Publication Number Publication Date
EP0012048A1 true EP0012048A1 (de) 1980-06-11
EP0012048B1 EP0012048B1 (de) 1982-11-24

Family

ID=9214892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400820A Expired EP0012048B1 (de) 1978-11-10 1979-11-05 Schalter mit rotierendem Lichtbogen

Country Status (6)

Country Link
US (1) US4329551A (de)
EP (1) EP0012048B1 (de)
DE (1) DE2964113D1 (de)
FR (1) FR2441261A1 (de)
SG (1) SG61185G (de)
YU (1) YU41190B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478866A1 (fr) * 1980-03-24 1981-09-25 Merlin Gerin Interrupteur a courant alternatif a arc tournant
FR2487113A1 (fr) * 1980-07-17 1982-01-22 Merlin Gerin Interrupteur a arc tournant double
FR2494493A1 (fr) * 1980-11-17 1982-05-21 Merlin Gerin Disjoncteur electrique a autosoufflage par rotation de l'arc
EP0064425A2 (de) * 1981-04-20 1982-11-10 Merlin Gerin Schalter mit in einem Isoliergas rotierenden Lichtbogen
FR2505550A1 (fr) * 1981-05-11 1982-11-12 Yaskawa Denki Seisakusho Kk Interrupteur electrique a remplissage gazeux
FR2599187A1 (fr) * 1986-05-26 1987-11-27 Merlin Gerin Disjoncteur electrique a isolement gazeux et a bobine de soufflage electromagnetique pour la rotation de l'arc
FR2620854A1 (fr) * 1987-09-23 1989-03-24 Alsthom Bobine de soufflage magnetique par rotation de l'arc pour element de contact d'un interrupteur electrique
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039523B1 (de) * 1980-05-07 1983-06-08 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
FR2565731A1 (fr) * 1984-06-08 1985-12-13 Interaction Perfectionnements aux disjoncteurs
FR2596578B1 (fr) * 1986-03-28 1994-05-06 Merlin Et Gerin Disjoncteur electrique a autoexpansion et a arc tournant
FR2665571B1 (fr) * 1990-08-01 1992-10-16 Merlin Gerin Disjoncteur electrique a arc tournant et a autoexpansion.
US5464956A (en) * 1994-04-08 1995-11-07 S&C Electric Company Rotating arc interrupter for loadbreak switch
KR100351300B1 (ko) * 2000-09-27 2002-09-05 엘지산전 주식회사 회로차단기용 복합소호장치
FR2845514B1 (fr) * 2002-10-03 2004-11-12 Alstom Disjoncteur a gaz a arc tournant
CN102522251A (zh) * 2011-12-09 2012-06-27 沈阳工业大学 Sf6断路器旋磁式灭弧室结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1171319A (fr) * 1956-07-10 1959-01-23 C K D Modrany Commutateur électrique avec chambre d'extinction
GB1086546A (en) * 1965-09-14 1967-10-11 Gen Electric Gas-blast circuit breaker
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2282711A1 (fr) * 1974-08-20 1976-03-19 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4052576A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Contact structure for SF6 arc spinner
FR2368792A1 (fr) * 1976-10-20 1978-05-19 Cem Comp Electro Mec Appareil electrique de coupure, notamment un disjoncteur, a auto-soufflage de l'arc de coupure par un gaz
DE2723552A1 (de) * 1977-04-29 1978-11-02 Bbc Brown Boveri & Cie Elektrischer gasschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2294801A (en) * 1938-05-25 1942-09-01 Westinghouse Electric & Mfg Co Circuit interrupter
US3334658A (en) * 1964-03-04 1967-08-08 Randolph Mfg Co Selector valve

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1171319A (fr) * 1956-07-10 1959-01-23 C K D Modrany Commutateur électrique avec chambre d'extinction
GB1086546A (en) * 1965-09-14 1967-10-11 Gen Electric Gas-blast circuit breaker
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2282711A1 (fr) * 1974-08-20 1976-03-19 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4052576A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Contact structure for SF6 arc spinner
FR2368792A1 (fr) * 1976-10-20 1978-05-19 Cem Comp Electro Mec Appareil electrique de coupure, notamment un disjoncteur, a auto-soufflage de l'arc de coupure par un gaz
DE2723552A1 (de) * 1977-04-29 1978-11-02 Bbc Brown Boveri & Cie Elektrischer gasschalter
FR2389219A1 (fr) * 1977-04-29 1978-11-24 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
CH612293A5 (de) * 1977-04-29 1979-07-13 Bbc Brown Boveri & Cie

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478866A1 (fr) * 1980-03-24 1981-09-25 Merlin Gerin Interrupteur a courant alternatif a arc tournant
FR2487113A1 (fr) * 1980-07-17 1982-01-22 Merlin Gerin Interrupteur a arc tournant double
EP0045229A1 (de) * 1980-07-17 1982-02-03 Merlin Gerin Schalter mit doppelt rotierendem Lichtbogen
US4529853A (en) * 1980-11-17 1985-07-16 Merlin Gerin Electric circuit breaker with self blow-out by rotation of the arc
FR2494493A1 (fr) * 1980-11-17 1982-05-21 Merlin Gerin Disjoncteur electrique a autosoufflage par rotation de l'arc
EP0053524A1 (de) * 1980-11-17 1982-06-09 Merlin Gerin Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation
EP0064425A2 (de) * 1981-04-20 1982-11-10 Merlin Gerin Schalter mit in einem Isoliergas rotierenden Lichtbogen
EP0064425A3 (en) * 1981-04-20 1983-08-17 Merlin Gerin Interrupter with rotating arc in an insulating gas
FR2505550A1 (fr) * 1981-05-11 1982-11-12 Yaskawa Denki Seisakusho Kk Interrupteur electrique a remplissage gazeux
FR2599187A1 (fr) * 1986-05-26 1987-11-27 Merlin Gerin Disjoncteur electrique a isolement gazeux et a bobine de soufflage electromagnetique pour la rotation de l'arc
FR2620854A1 (fr) * 1987-09-23 1989-03-24 Alsthom Bobine de soufflage magnetique par rotation de l'arc pour element de contact d'un interrupteur electrique
EP0308847A1 (de) * 1987-09-23 1989-03-29 Gec Alsthom Sa Magnetische Blasspule mit Lichtbogenrotation für Schaltelement eines elektrischen Schalters
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Also Published As

Publication number Publication date
EP0012048B1 (de) 1982-11-24
FR2441261A1 (fr) 1980-06-06
DE2964113D1 (en) 1982-12-30
FR2441261B1 (de) 1981-08-21
US4329551A (en) 1982-05-11
SG61185G (en) 1986-11-21
YU269179A (en) 1982-06-30
YU41190B (en) 1986-12-31

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